Seagate ST9100828AS - Momentus 5400.3 100 GB Hard Drive, Product Manual

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Momentus 5400.3 SATA Product Manual, Rev. D 13
2.11 Acoustics
Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All mea-
surements are consistent with ISO document 7779. Sound power measurements are taken under essentially
free-field conditions over a reflecting plane. For all tests, the drive is oriented with the cover facing upward.
Note. For seek mode tests, the drive is placed in seek mode only. The number of seeks per second is
defined by the following equation:
(Number of seeks per second = 0.4 / (average l average access time))
*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
2.12 Electromagnetic immunity
When properly installed in a representative host system, the drive operates without errors or degradation in
performance when subjected to the radio frequency (RF) environments defined in the following table:
Table 5: Drive level acoustics
Models Idle* Performance seek
2 discs ST9160821AS
ST9120822AS
ST9100828AS
2.4 bels (typ)
2.6 bels (max)
3.0 bels (typ)
3.2 bels (max)
1 disc ST980811AS
ST960813AS
ST940814AS
2.2 bels (typ)
2.4 bels (max)
2.9 bels (typ)
3.1 bels (max)
Table 6: Radio frequency environments
Test Description
Performance
level Reference
standard
Electrostatic discharge Contact, HCP, VCP:
±
4 kV; Air:
±
8 kV B EN 61000-4-2: 95
Radiated RF immunity 80 to 2,000 MHz, 10 V/m,
80% AM with 1 kHz sine
900 MHz, 3 V/m, 50% pulse modulation @ 200 Hz
A EN 61000-4-3: 96
ENV 50204: 95
Electrical fast transient
±
1 kV on AC mains,
±
0.5 kV on external I/O B EN 61000-4-4: 95
Surge immunity
±
1 kV differential,
±
2 kV common, AC mains B EN 61000-4-5: 95
Conducted RF immunity 150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz
sine A EN 61000-4-6: 97
Power Frequency H-field
immunity 1 A/m, 50Hz/60Hz, 3 axes A EN 61000-4-8: 97
Voltage dips, interrupts 30% Reduction for 25 cycles
>95% Reduction for 250 cycles
>95%, 0.5 cycles
C
C
B
EN 61000-4-11: 94